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SSC's

na de pers-publicatie eerder deze week, volgt hier de beloofde advisory.
De volledige tekst zal vannacht in de cert-cc-mirror opduiken.

cheers,

teun

=============================================================================
Security Advisory                                                     CERT-NL
=============================================================================
Author/Source : Teun Nijssen                                Index  :  S-96-07
Distribution  : World                                       Page   :        1
Classification: External                                    Version:        1
Subject       : Vulnerability in Kerberos 4 Key Server      Date   :21-Feb-96
=============================================================================

By courtesy of CERT Coordination Center we received the following information.

The CERT Coordination Center has received reports of a vulnerability in the
Kerberos Version 4 server. On unpatched Kerberos 4 systems, under certain
circumstances, intruders can masquerade as authorized Kerberos users and gain
access to services and resources not intended for their use. The CERT team
recommends that you apply one of the solutions given.

The Kerberos Version 5 server running in Version 4 compatibility mode is also
vulnerable under certain circumstances. The Massachusetts Institute of
Technology (MIT) is working on the patches for that version.


CERT-NL urges you to install the appropriate patch from your vendor.

CERT Coordination Center has released Security Advisory CA-96.03 to tackle
this problem.

Additional information with regards to this vulnerability is placed in
the README file associated with the advisory. You are encouraged to check
on README file updates regularly. You can automate that process by using
the CERT-NL notifier service.

All CERT Coordination Center advisories and README's are mirrored by CERT-NL.
The specific URL's for this case are:

ftp://ftp.surfnet.nl/surfnet/net-security/cert-cc-mirror/cert_advisories/
CA-96.03.*
ftp://ftp.surfnet.nl/surfnet/net-security/cert-cc-mirror/cert_advisories/
CA-96.03.README

More information about the CERT-NL mirror and notifier services is
contained in News items N-95-01 (notifier) and N-95-02 (CERT mirror),
both present on ftp://ftp.surfnet.nl/surfnet/net-security/cert-nl/docs/news/

=============================================================================
CERT-NL is the Computer Emergency Response Team for SURFnet customers.
SURFnet is the Dutch network for educational, research and related institutes.
CERT-NL is a member of the Forum of Incident Response and Security Teams
(FIRST).

All CERT-NL material is available under:
  http://www.surfnet.nl/surfnet/security/cert-nl.html
  ftp://ftp.surfnet.nl/surfnet/net-security

In case of computer or network security problems please contact your
local CERT/security-team or CERT-NL  (if your institute is NOT a SURFnet
customer please address the appropriate (local) CERT/security-team).

CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer,
i.e. UTC+0100 in winter and UTC+0200 in summer (DST).
   Email:     cert-nl@surfnet.nl
   Phone:     +31 302 305 305
   Fax:       +31 302 305 329
   Snailmail: SURFnet bv
              Attn. CERT-NL
              P.O. Box 19035
              NL - 3501 DA  UTRECHT
              The Netherlands
   A 7 * 24 hours phone number is available to SURFnet SSC's and FIRST
   members on request.
=============================================================================


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